Holder for flat films with clamping devices for the edges of the films



June 12, 1928. 1,672,925

. O. BECKER HOLDER FOR FLAT FILMS WITH CLAMPING DEVICES FOR THE EDGES OFTHE FILMS Filed April 29, 1927 5 film is gripped by 0 in connection withthese clamping devices 2 Patented June 12, 192 1 TRIEAKTIENGESELLSCHAFT,

HOLDER FOR FLAT FILMS WITH CLAMPIN G DEVICES FOR GERMANY, ASSIGNOR TO I.S. FARBENINDUS- 'OF FRANKFORTON-THE-MAIN, GERMANY.

THE EDGES OF THE FILMS.

Application filed April 29, 1927, Serial No. 187,609, and in Germany May5, 1926.

The present invention relates to a holder for vfilms during developmentand other treatment of the films whilst in an upright (that is avertical). position in which the a clamping device that is entirelyreliable in its action.

The chief feature of the present invention 's that in spite of the factthat the edges of the film are immovably gripped the film is easilyinserted in the holder with or Without a special insertion device owingto the fact that the clamping devices are formed with funnel-shapedentrance slots for the film. This enables the fiat film, which is highlysensitive and coated on both sides by emulsion, to be insertedaccurately wlthout danger of damage. The various clamping devices haverims formed by the upwardly bent edges of a plate member and rims andbesides them an arm movable in aplane parallel to them. which arm, if itis downwardly displaced, bends the edge of the film acutely about oneedge and thus grips it firmly.

One form of construction of the invention is shown in the annexeddrawings In which v p Fig. 1 is a front view of a film holder.

ig. 2 is a side view, and v I Fig. 3 is a rear view of a clamping deviceon a larger scale.

ig. 4 is a cross-section of the closed clamping device, that is with themovable arm in its lowered position, and

Fig. 5 is a cross-section of the clamping device open, that is with themovable arm raised.

As shown in Fig. 1, 1 is a rectangular frame which is preferably of bentwire, and of which the upper cross-member enables the frame to behandled, for example, for

the side members of this frame are secured film to be gripped.

Such a clamping device consists see Figs. 2-5) of a plate member3 bentout of a strip of metal of U-section, so that the shank portion 4carries the edge members 5, between which is an entrance slot 6 for theclaim 1, immersing it or hanging it in a bath. To h for the edges of thel film. The front edges of these bent portions 5 are cut obliquely sothat the insertion slot 6 broadens out in an upward direction, andconsequently it is easily possible to insert the hlm in the clampingdevice from above. 55

Inserted in this way, neighbourhood of its narrow edge 7 of one of thebent portions 5 of the clamping device 2. In proximity to the bentportion 5 the spring arm 8 is secured to the plate member 3 in suchmanner that its under surface is not normally in the position shown inFig. 3 behind or in front of the member 5, but, lying inside the shankof the plate member of U-shaped cross-section, leaves the funnel-shapedinsertion slot open. In an opening in the member 1, an eccentric 9 ismovably mounted on the pin 10, and is provided with a handle Thiseccentric rests on the upper surface of the arm 8. If the eccentric isrotated owing to movement of the handle 11 so that the eccentric bearsagainst the shank 4 of the member 3, the eccentric bears upon the arm 8.which is pressed to pass the edge 7 (see Fig. 4) and bends the edge ofthe film located at the narrow'edge the film lies in the movableclamping of the edge of the film in the clamping device is thusattained.

aving now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed. I declare thatwhat I claim is:

1. A holder for flat films provided with a clamping device for the edgesof the films characterized by the fact that the clamping devices areprovided with funnel-shaped slots for the edges of the films.

2. A holder for flat-films according to characterized by the fact thatthe older comprises an edge upon which the film lies and over which itis bent about its L movable laterally of the strip on the downwardmovement of a lever provided with an eccentric.

3. A holder for flat films according to 7 claim 1 characterized by thefact that the clamping device consists of amember formed metal plate, ofwhich the arms by bending a side edges upon the g of the bent portion 5about this narrow ed e, and 1mare once so bent at their front portionsthat spring is arranged as a swinging arm for a slot is formed betweenthe latter for the pressing down the inserted film, which insertion ofthe film, which bears upon the spring can be pressed down by means of an10 narrow edge of the bent central portion. eccentric movably positionedin one of the 5 4. A holder. for flat films according to arms of theframe.

claim 1 characterized by the fact that in the In testimony whereof Iaflix my signature; plate member formed by bending, a leaf I OSCARBECKER.

